With Wheeljack, Airachnid, the Autobot plague ship and the Decepticon's Nemesis it has been established that most Transformers utilize ships to travel through space. So where are Team Prime's ship? The Autobots seem to have a tactical disadvantage in that department. Especially if the Decepticons discover or know (Megatron) where their base is. Knockout already could guess the general region of it.